Small sample hanging type clamp for high-temperature test

Abstract

The utility model belongs to the field of tensile fixtures for high-temperature testing, and particularly relates to a small sample hanging fixture for high-temperature testing, which comprises a fixture body and two structurally symmetrical sample sleeves embedded in the fixture body, and the two structurally symmetrical sample sleeves can be embedded in a clamping part of the fixture body after being buckled. Baffles are arranged on the two sides of the clamp body and matched with the two sample sleeves. According to the clamp, the two sample sleeves which are matched with the clamping part of an existing clamp and are symmetrical in structure are additionally arranged, the two sample sleeves are symmetrically buckled to form the clamping space for the end of the small sample, then the sample sleeves are embedded into the clamping part of the clamp body, the sample sleeves are fixed through the baffles, and therefore centering clamping and fixing of the small sample are achieved; furthermore, the interior of the sample sleeve is improved to be of a step-shaped structure, corresponding limiting blocks are matched, small samples of different sizes can be clamped and fixed, the structure of an existing clamp does not need to be greatly improved, and good universality is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of universal testing machine equipment and relates to a tensile clamp for high-temperature testing, in particular to a small sample hanging clamp for high-temperature testing. Background Art

[0002] A universal testing machine is a device capable of performing a variety of mechanical property tests. It typically consists of a frame, fixtures, sensors, an operating system, and data processing software. By clamping the material to be tested between two opposing fixtures and controlling their movement toward or relative to each other, the machine tests the material's mechanical properties, such as strength, hardness, ductility, toughness, and fatigue resistance. High-temperature tensile fixtures are typically used in conjunction with universal testing machines and high-temperature furnaces. They enable stable tensile testing of samples in high-temperature environments to assess mechanical properties such as tensile strength and ductility.

[0003] Existing tensile fixtures for high-temperature testing are typically large and unsuitable for clamping small specimens. Furthermore, during tensile testing, the specimen's ends must be aligned, preventing torque from being generated. This can lead to inaccurate test results and even damage to brittle specimens during the clamping process. When clamping small specimens with existing tensile fixtures, the mismatch between the ends of the specimen and the gripping portion of the tensile fixture makes it difficult to achieve centered clamping. Furthermore, different sample sizes typically require correspondingly sized tensile fixtures, resulting in limited versatility. Utility Model Content

[0004] In view of the fact that existing tensile clamps for high-temperature testing are difficult to adapt to the centering, clamping and fixing of small specimens and the clamping of samples of different sizes, the purpose of this application is to provide a small specimen hanging clamp for high-temperature testing. Based on the clamping part of the existing hanging clamp, a specimen sleeve that is compatible with its clamping part and a limit block provided in the specimen sleeve are added to meet the centering, clamping and fixing of small specimens of different sizes.

[0005] Based on the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A small sample hanging fixture for high-temperature testing includes a fixture body, and a first sample sleeve and a second sample sleeve embedded in the fixture body. The first sample sleeve and the second sample sleeve are arranged opposite each other in the fixture body and have a symmetrical structure, and a clamping space for the small sample is formed therein; the first sample sleeve and the second sample sleeve are both detachably connected to the fixture body; the hanging fixture also includes baffles arranged on both sides of the fixture body, the baffles cooperate with the first sample sleeve and the second sample sleeve, and the baffles are detachably connected to the fixture body.

[0007] By adding two symmetrical specimen sleeves that match the existing hanging clamp, the ends of the small specimens are clamped and fixed using the two symmetrically arranged specimen sleeves, and the specimen sleeves are embedded in the clamping part of the clamp body, and then the specimen sleeves are fixed using the baffles on both sides of the clamp body, the small specimens can be centrally clamped and fixed, and are suitable for the existing clamp body. There is no need to develop additional clamps specifically for small specimens, which reduces the cost of fixture modification.

[0008] Furthermore, the interiors of the first sample sleeve and the second sample sleeve are both stepped structures along their depth direction, and a limit block is provided in the clamping space opposite to the first sample sleeve and the second sample sleeve. The two ends of the limit block are respectively matched with the stepped structures of the first sample sleeve and the second sample sleeve, and the limit block is provided with a groove that matches the end of the small sample.

[0009] The interior of the specimen sleeve adopts a stepped structure, and a limit block matching the stepped structure is added, and a groove matching the end of the small specimen is opened on the limit block. The sizes of the limit blocks adapted to different layers of the stepped structure and the sizes of the grooves opened on the limit blocks are different, so as to meet the needs of centering, clamping and fixing of small specimens of different sizes. When in use, only the limit block matching the specimen size needs to be selected, fixed to the inside of the specimen sleeve, and then embedded in the clamping part of the fixture body.

[0010] Furthermore, the stepped structures inside the first sample sleeve and the second sample sleeve both extend from the open end of the sample sleeve toward the interior thereof in a shrinking shape.

[0011] This method can meet the requirements of limiting and fixing limit blocks of different sizes, thereby achieving clamping and fixing of samples of different sizes.

[0012] Furthermore, a plurality of limit blocks are provided, and the plurality of limit blocks are respectively matched with corresponding layers of the stepped structure in the first sample sleeve and the second sample sleeve.

[0013] Furthermore, the clamp body includes a connecting portion and a clamping portion that are integrally connected, and the first sample sleeve and the second sample sleeve are embedded in the clamping portion.

[0014] Furthermore, threaded holes are provided on the clamping portion of the clamp body and the baffle, and the baffle is fixed to both sides of the clamp body by the cooperation of fixing nuts and the threaded holes.

[0015] Furthermore, the connecting portion of the clamp body is detachably connected to the connecting rod of the high-temperature stretching device through a locking nut.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] The present application provides a small sample hanging clamp for high temperature testing, which is provided with two symmetrical sample sleeves that match the clamping part of the existing clamp. The two sample sleeves are symmetrically buckled to form a clamping space for the end of the small sample. The sample sleeve is then embedded in the clamping part of the clamp body and fixed by a baffle, thereby meeting the requirements of centering and clamping the small sample. The interior of the sample sleeve is improved to a step-shaped structure and matched with corresponding limit blocks, thereby meeting the requirements of clamping and fixing small samples of different sizes. There is no need to make major improvements to the structure of the existing clamp, and it has good versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the clamping state of the small sample hanging fixture in Example 1;

[0019] Figure 2 This is a schematic diagram of the explosion structure of the small sample hanging fixture in Example 1;

[0020] Figure 3 This is a schematic diagram of the assembled state of the sample sleeve and the small sample when clamped in Example 1;

[0021] Figure 4 This is a schematic structural diagram of the small sample hanging fixture in use according to Example 1;

[0022] Figure 5 This is a schematic diagram of the explosion structure of the small sample hanging fixture in Example 2;

[0023] Figure 6 This is a schematic diagram of the assembled state of the sample sleeve and the small sample when clamped in Example 2;

[0024] Figure 7 This is a schematic diagram of the disassembly state of the sample sleeve and the sample clamping in Example 2;

[0025] Figure 8 It is a schematic diagram of the local structure when the specimen sleeve and the specimen are matched;

[0026] Figure 9 Schematic diagram of the structure of the sample set;

[0027] Figure 10 The main view and cross-sectional view of the specimen sleeve;

[0028] Figure 11 Schematic diagram of the three-dimensional structure of the limit block;

[0029] Figure 12 This is the right view and cross-sectional view of the limit block.

[0030] Figure numbers and markings: 1. Clamp body; 2. First specimen sleeve; 3. Second specimen sleeve; 4. Small specimen; 5. Baffle; 6. Limit block; 601. Groove; 7. Fixing nut; 8. Bolt; 9. Threaded hole; 10. Locking nut; 11. Connecting rod. DETAILED DESCRIPTION

[0031] To better illustrate the purpose, technical solutions and advantages of this application, the present application will be further described below in conjunction with specific embodiments. Those skilled in the art should understand that the specific embodiments described herein are only used to explain this application and are not intended to limit this application. Example 1

[0032] This embodiment provides a small sample hanging fixture for high temperature testing, such as Figure 1 and 2 As shown, the fixture includes a fixture body 1, and a first sample cover 2 and a second sample cover 3 embedded in the fixture body 1. The first sample cover 2 and the second sample cover 3 are arranged opposite to each other in the fixture body 1 and have a symmetrical structure. After the two symmetrical first sample covers 2 and the second sample covers 3 are buckled together (as shown in FIG. Figure 3 As shown in the figure, a clamping space is formed inside the first and second specimen sleeves 2 and 3 for clamping and securing the small specimen 4. Since the first and second specimen sleeves 2 and 3 are symmetrical, the clamped specimen 4 is centered after being clamped and secured at both ends.

[0033] The first sample sleeve 2 and the second sample sleeve 3 are both detachably connected to the clamp body 1. The clamp body 1 includes an integrated connecting portion and a clamping portion. The first sample sleeve 2 and the second sample sleeve 3 are buckled together and embedded in the clamping portion of the clamp body 1.

[0034] Baffles 5 are removably secured to both sides of the fixture body 1. These baffles 5 engage the first and second sample sleeves 2, 3, securing the first and second sample sleeves 2, 3 within the fixture body 1. This prevents them from shifting or shaking during testing, which could lead to inaccurate test results. The baffles 5 are removably connected to the fixture body 1. For example, threaded holes 9 are provided on both the clamping portion of the fixture body 1 and the baffles 5. The baffles 5 are secured to the fixture body 1 via retaining nuts 7 that engage the threaded holes 9, facilitating assembly and disassembly of the first and second sample sleeves 2, 3.

[0035] By adding two symmetrical sample sleeves that match the existing hanging clamp, the ends of the small sample 4 are clamped and fixed using the two symmetrically arranged sample sleeves, and the sample sleeves are embedded in the clamping part of the clamp body 1, and then the baffles 5 on both sides of the clamp body 1 are used to fix the sample sleeves, thereby achieving centering clamping and fixation of the small sample 4. It is also suitable for the existing clamp body and does not require additional development of a clamp specifically suitable for small samples, thereby reducing the cost of clamp modification.

[0036] When the fixture is used in this application, if Figure 4 As shown, the connection portion of the clamp body 1 is detachably connected to the connecting rod 11 of the high-temperature tensile device through a locking nut 10. After the upper and lower connecting rods 11 are respectively connected to the universal testing machine, the mechanical properties test of the small sample can be performed.

[0037] The hanging fixture of this embodiment is used as follows: After snapping two symmetrical first and second specimen sleeves 2, 3 onto one end of a small specimen 4, they are inserted into the clamping portion of the fixture body 1. The baffles 5 on either side of the fixture body 1 are secured using nuts 7 and bolts 8 to limit the position of the first and second specimen sleeves 2, 3 embedded within the fixture body 1. The other end of the small specimen 4 is also clamped and secured using the hanging fixture of this embodiment in the same manner. Subsequently, the connecting portions of the two hanging fixtures are connected to the connecting rods of the high-temperature tensile device using locking nuts 10. The two connecting rods are then secured to the universal testing machine, allowing mechanical property testing of the small specimen to be performed. Example 2

[0038] The structure of the hanging fixture in this embodiment is as follows Figures 5 to 8 As shown, the use of the hanging clamp is substantially the same as that of Example 1. The difference is that, based on Example 1, the structure of the sample sleeve is improved in this embodiment to meet the requirements of clamping and fixing small samples 4 of different sizes.

[0039] In this embodiment, the interior of the first sample sleeve 2 and the second sample sleeve 3 are both stepped along their depth direction. Figure 9 and Figure 10 As shown, a limiting block 6 is provided in the clamping space where the first sample sleeve 2 and the second sample sleeve 3 are arranged opposite to each other. Figure 11 and Figure 12 As shown, both ends of the limiting block 6 respectively match the step-shaped structures of the first sample sleeve 2 and the second sample sleeve 3 , and a groove 601 is provided on the limiting block 6 to match the end of the small sample 4 .

[0040] The interior of the sample sleeve adopts a stepped structure, and a limit block 6 is added to match the stepped structure. The sizes of the limit blocks 6 adapted to different layers of the stepped structure and the sizes of the grooves 601 opened on the limit blocks 6 are different, so as to meet the needs of centering, clamping and fixing of small samples 4 of different sizes. When in use, only the limit block 6 that matches the size of the sample 4 is selected, and the limit block 6 is fixed to the inside of the sample sleeve, and then embedded in the clamping part of the clamp body 1.

[0041] The stepped structures within both the first and second sample sleeves 2 and 3 extend from the open ends of the sleeves toward the interior, tapering inward. This approach allows for the positioning of stoppers 6 of varying sizes, thereby enabling the clamping and securing of samples of varying sizes. Multiple stoppers 6 are provided, each corresponding to a corresponding layer of the stepped structures within the first and second sample sleeves 2 and 3.

[0042] A groove 601 is provided on the limiting block 6 to match the end of the small sample 4, which can limit the clamping position of the small sample 4 so that the small sample 4 is in a centered state after being clamped and fixed by the first sample sleeve 2, the second sample sleeve 3 and the limiting block 6, thereby clamping and fixing the two ends of the small sample 4 in the center.

Claims

1. A small sample hanging fixture for high temperature testing, characterized in that: The hanging fixture comprises a fixture body, and a first sample sleeve and a second sample sleeve embedded in the fixture body. The first sample sleeve and the second sample sleeve are arranged opposite to each other in the fixture body and have a symmetrical structure, and a clamping space for small samples is formed therein; the first sample sleeve and the second sample sleeve are both detachably connected to the fixture body; the hanging fixture also comprises baffles arranged on both sides of the fixture body, the baffles cooperate with the first sample sleeve and the second sample sleeve, and the baffles are detachably connected to the fixture body.

2. The small sample hanging fixture for high temperature testing according to claim 1, characterized in that: The interiors of the first sample sleeve and the second sample sleeve are both stepped structures along their depth direction. A limit block is provided in the clamping space opposite to the first sample sleeve and the second sample sleeve. The two ends of the limit block are respectively matched with the stepped structures of the first sample sleeve and the second sample sleeve. The limit block is provided with a groove that matches the end of the small sample.

3. The small sample hanging fixture for high temperature testing according to claim 2, characterized in that: The step-shaped structures inside the first sample sleeve and the second sample sleeve both extend from the opening end of the sample sleeve toward the interior thereof in a shrinking shape.

4. The small sample hanging fixture for high temperature testing according to claim 2, characterized in that: There are multiple limit blocks, and the multiple limit blocks are respectively matched with corresponding layers of the stepped structure in the first sample sleeve and the second sample sleeve.

5. The small sample hanging fixture for high temperature testing according to claim 1, characterized in that: The clamp body includes a connecting portion and a clamping portion that are integrally connected, and the first sample sleeve and the second sample sleeve are embedded in the clamping portion.

6. The small sample hanging fixture for high temperature testing according to claim 5, characterized in that: Threaded holes are provided on the clamping portion of the clamp body and the baffle, and the baffle is fixed to both sides of the clamp body by the cooperation of fixing nuts and the threaded holes.

7. The small sample hanging fixture for high temperature testing according to claim 5, characterized in that: The connecting portion of the clamp body is detachably connected to the connecting rod of the high-temperature stretching device through a locking nut.

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